Executive Summary & Difficulty Verdict

The May/June 2026 examination maintained a standard and accessible difficulty profile (estimated at 2.8 / 5.0). Paper 1 placed significant emphasis on fundamental architecture, data conversion routines (Two's complement, Hexadecimal conversions), network packet structures, and cyber threats. Paper 2 tested core algorithmic competencies with classic linear search error correction, trace tables evaluating substring matching, file I/O operations, and an extended 15-mark 1D array scenario.

Where the Marks Were Won & Lost

Paper 1 Highlights:

  • High-Yield Areas: Standard base conversions (Binary, Hexadecimal, Denary) and two's complement representations offered high accessibility. Candidates who memorised packet switching terminology (Header, Trailer, Payload) and FDE cycle register roles scored heavily.
  • Examiner Pitfalls: Vague definitions regarding CPU clock speed (requiring exact reference to 3 billion cycles/instructions per second) and lossy vs. lossless compression mechanisms cost marks. On cyber security questions, confusing hacking with malware or omitting the mechanism of access permissions led to mark deductions.

Paper 2 Highlights:

  • Algorithm Structure & Logic: In Question 5, spotting linear search syntax and logical errors in a 2D array was straightforward for well-practised students. Question 6’s trace table demanded strict adherence to character indices and loop termination criteria.
  • Extended 15-Mark Problem: Question 10 evaluated array iteration, rounding functions (\(\text{ROUND}\)), totalling, and tracking maximum consecutive occurrences (dry days). Common loss points included neglecting explicit variable declarations and failing to reset consecutive streak counters properly.

Strategic Preparation & Revision Recommendations

Ensure comprehensive familiarity with pseudocode standard conventions, particularly OPENFILE, READFILE, and CLOSEFILE file-handling syntax. Practice logic circuit drawing and truth table evaluation thoroughly, as Boolean logic remains a guaranteed mark reservoir. In Paper 1, focus on precise definitions for emerging technologies (AI machine learning rules) and low-level language translation.